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If you use Windows 7, u might have hybrid sleep activated. This is similar to hibernate. When u choose SLEEP, your computer goes to hibernate. Sometimes this hibernate just hangs. You have to reboot computer.Try pressing the power button for several seconds (10-15). It should power off the laptop. If not, unplug the charger and remove the battery for a few minutes. Then try to start it up again.

Hello sir, hi, you definitely need your CD with driver which came with your Dell laptop, Use the CD to install the webcam software driver and application. If you cant find the CD, go to DELL website www.dell.com and download the driver for your webcam, and hopefully the laptop/webcam supports windows 7. If not you may need to wait for the driver.

If you have the recovery disk of your laptop.First boot cd/dvd rom drive and load the recovery software and follow on the screen instructions. That will restore your computer factory settings but be careful and not to forget to back up or save your data or files before recovering your system.

If you can resume or turn back to windows desktop, try updating your windows or downloading updates from Microsoft to fix some bugs or errors.

keep press power button for 1 mins and your laptop will turn off. when you turn on your laptop. disable hibernate mode.
to return to your desktop from hibernate mode press power button quickly. windows will resume

You probably have a sticking hibernate, or sleep button. Near the hinge, there is a tiny pin looking thing sticking up. When you shut the computer, this presses against a switch below the case and puts the computer into sleep or hibernate mode. If this sticks, it won't boot up right. Shut the computer down and use canned air to blow out at the pin opening to clear any debris.